CN103154479B - Scalability idle stroke for fuel injection valve compensates - Google Patents
Scalability idle stroke for fuel injection valve compensates Download PDFInfo
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- CN103154479B CN103154479B CN201180025368.8A CN201180025368A CN103154479B CN 103154479 B CN103154479 B CN 103154479B CN 201180025368 A CN201180025368 A CN 201180025368A CN 103154479 B CN103154479 B CN 103154479B
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- 238000002347 injection Methods 0.000 title claims description 12
- 239000007924 injection Substances 0.000 title claims description 12
- 239000000446 fuel Substances 0.000 title description 5
- 238000000034 method Methods 0.000 claims abstract description 47
- 230000005611 electricity Effects 0.000 claims abstract description 46
- 238000012360 testing method Methods 0.000 claims abstract description 22
- 238000002485 combustion reaction Methods 0.000 claims abstract description 19
- 238000012546 transfer Methods 0.000 claims description 10
- 230000008859 change Effects 0.000 claims description 9
- 238000012986 modification Methods 0.000 description 7
- 230000004048 modification Effects 0.000 description 7
- 238000012937 correction Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000033228 biological regulation Effects 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/32—Controlling fuel injection of the low pressure type
- F02D41/34—Controlling fuel injection of the low pressure type with means for controlling injection timing or duration
- F02D41/345—Controlling injection timing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D41/2096—Output circuits, e.g. for controlling currents in command coils for controlling piezoelectric injectors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2409—Addressing techniques specially adapted therefor
- F02D41/2416—Interpolation techniques
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2425—Particular ways of programming the data
- F02D41/2429—Methods of calibrating or learning
- F02D41/2438—Active learning methods
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2425—Particular ways of programming the data
- F02D41/2429—Methods of calibrating or learning
- F02D41/2451—Methods of calibrating or learning characterised by what is learned or calibrated
- F02D41/2464—Characteristics of actuators
- F02D41/2467—Characteristics of actuators for injectors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
- F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
- F02M63/0026—Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
- F02D2041/2051—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit using voltage control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/0602—Fuel pressure
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fuel-Injection Apparatus (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Introduce a kind of for driving the method for internal-combustion engine and a kind of internal-combustion engine.This internal-combustion engine has ejecting system, the sparger that ejecting system is driven by final controlling element indirectly with at least one and high pressure reservoir.According to the method, give the test pulse of electricity that the final controlling element of at least one sparger applies to have the energy increased repeatedly continuously, and adopt hydraulic pressure and/or the mode of electricity ask for the idle stroke of final controlling element continuously.When determining that idle stroke changes, the discharge time of sparger is corrected accordingly.
Description
The present invention relates to that a kind of internal-combustion engine has ejecting system for driving the method for internal-combustion engine, the sparger that ejecting system is driven by final controlling element indirectly with at least one and high pressure reservoir.
With regard to the fuel injector indirectly driven, the final controlling element particularly valve piston of piezo actuator to control valve controls, and affects the pressure proportional between control chamber and valve pocket whereby.Here, the motion of control valve piston is determined by the power situation caused respectively (pressure in control chamber and actuator cavity and the power/expansion applied by final controlling element).If trigger injection, just electric energy is applied to final controlling element.In this case, such as under energy hole, final controlling element is controlled.Measure the voltage on charging current and final controlling element for this reason concurrently, and determine current energy according to formula " E=0.5* ∫ (I piezoelectricity) dt*U piezoelectricity ".
With regard to piezo actuator, final controlling element expands due to piezoelectric effect, and applies power to the valve piston of control valve.If final controlling element power exceedes counter-force, control valve is just opened, so the pressure drop in control chamber.According to enter into control chamber or the ratio of amount of fuel of discharging from control chamber, the power situation on needle changes, and this needle carries out moving and opening spray-hole according to institute's generation power.In order to end injection, after a predetermined period to final controlling element electric discharge, and closed control valve.The pressure set up in control chamber closes injection valve by the movement of needle.
Each sparger is especially particularly subject to machine error, temperature, break-in characteristic and effect of attrition in the amount error of its life period at this.The switching that thus can produce corresponding sparger is leaked.For corresponding amount extent by mistake, the energy requirement of the final controlling element needing to be used for opening control valve particularly piezo actuator plays a major role.This energy requirement is corresponding to the stroke being called idle stroke treating to be gone through by final controlling element.Because idle stroke changes because of wearing and tearing, life-span, temperature, power load distributing etc., so, actual ejection and given injection different.
The object of the invention is to, proposing a kind of for driving the method for internal-combustion engine, especially accurately can spray at the life period of the sparger of internal-combustion engine by the method.
According to the present invention, according to the first mode of execution, described object is achieved by a kind of method of described type, and the method has following steps:
Apply the test pulse of the electricity to have the energy increased repeatedly to continuously during the operation phase final controlling element of at least one sparger, transport pump or common injection is not carried out in the described operation phase, and the pressure drop caused thus of trying to achieve in high pressure reservoir, hydraulically ask for the idle stroke of final controlling element thus continuously;
When determine pressure drop change and and then determine that idle stroke changes, the discharge time of sparger is corrected accordingly.
According to the present invention, according to the second mode of execution, above-mentioned purpose is achieved by a kind of method with following steps:
Apply the test pulse of the electricity to have the energy increased repeatedly to continuously the final controlling element of at least one sparger, and try to achieve the voltage drop caused thus on the final controlling element of sparger, ask for the idle stroke of final controlling element thus continuously electricly;
When determine voltage drop change and and then determine compared to reference value idle stroke change, the discharge time of sparger is corrected accordingly.
Thus propose according to the present invention, separately and ask for the idle stroke of sparger continuously, and by means of the correction in sparger control, consider that the idle stroke compared to reference value such as occurred because of wearing and tearing, life-span, temperature and power load distributing etc. changes by carrying out discharge time correction.
In order to try to achieve idle stroke, the present invention proposes two method modification, and namely one is the idle stroke acquiring method of hydraulic pressure, and one is electric idle stroke acquiring method.The present invention also proposes the combination of these two kinds of methods.
Guarantee thus optimally to carry out discharge time correction in a continuous manner in the whole working zone of internal-combustion engine, (pressure, temperature, injecting times), wherein depending on part area, carry out pure hydraulic pressure, pure machinery or combination idle stroke determine.In overlap region, apply this two kinds of methods concurrently, and can compare these two kinds of methods there.
The something in common of two kinds of method modification is, applies the test pulse of the electricity to have the energy increased repeatedly to the sparger in ejecting system.Pressure in parameter known in system and high-pressure accumulator (common rail) or the voltage on the final controlling element (piezo actuator) of sparger are at this dividually or analyzed concurrently.
According to the method modification of the hydraulic pressure for determining idle stroke, before and after test pulse, the pressure in high-pressure accumulator is analyzed in time.Along with the energy of test pulse increases, final controlling element touches servovalve after going through idle stroke.The fuel oil be under high pressure in control chamber can be released by backflow.Thus pressure in high-pressure accumulator decline, this is because fuel oil successively flow into control chamber from reservoir.Based on the control to servovalve, pressure drop dP=(test pulse _ before _ pressure-accumulating tube pressure-test pulse _ afterwards _ pressure-accumulating tube pressure) size relevant to the stroke of control valve piston, and then relevant to the idle stroke of sparger.Thus can by trying to achieve the idle stroke change of sparger to the measurement of pressure drop dP.
According to the method modification of the electricity determined for idle stroke, at the voltage signal of test pulse period analysis on the final controlling element of sparger.These test pulses are divided into three phases.In the first phase, controllably electric charge is applied to final controlling element.Second stage-maintenance stage-in, between controller and final controlling element, do not carry out transferring charge.Phase III-discharge regime-in, from final controlling element output charge.Voltage on final controlling element is determined by the electric capacity of the applied quantity of electric charge, final controlling element and the power that produces on final controlling element.The electric capacity of final controlling element (piezo actuator) only changes slightly along with the temperature of final controlling element.During injection events, electric capacity is constant.Therefore, terminating and the voltage difference between starting of discharging in the charging process of final controlling element, is measuring of reducing of the power on final controlling element owing to causing by opening control valve and causing the pressure drop in control chamber.This voltage drop is thus also relevant to the idle stroke of sparger.Therefore, just can be changed in the hope of the idle stroke of sparger by measuring voltage decline.
Thus according to these two kinds of method modification, the energy of test pulse is increased repeatedly by the prolongation in the duration of charge (T_CHA) of final controlling element.Consequent pressure drop in the first modification or pressure surge dP (T_CHA) and the voltage drop in the second modification or voltage functuation dV (T_CHA) separately or are jointly recorded.Need institute's energy requirement of the voltage drop (dV_REF) of pressure surge (dP_REF) or the regulation being used for realizing regulation relevant to the idle stroke of sparger.
The method that the idle stroke of hydraulic pressure is determined has the high advantage of validity.The method also can be applicable to the little high-pressure accumulator pressure (pressure-accumulating tube pressure) being particularly less than 60Mpa.Direct relation is there is with the opening action of servovalve.But application is confined to the region (namely pressure-accumulating tube pressure is only by the switching leakage contribution of sparger) of not carrying out transport pump or injection.When pressure signal resolution signal scanning speed is given, need the test pulse (being generally 5ms) relatively grown.
By contrast, the advantage that the method that the idle stroke of electricity is determined has is that need relatively short test pulse (being usually less than 1ms), application does not limit by transport pump.But, only there is indirectly relation with the opening action of servovalve, and application is confined to be greater than 60 ... the pressure-accumulating tube pressure of 80Mpa.
In the particularly preferred mode of execution of the one of method of the present invention, hydraulic pressure determined mutually to combine with the idle stroke of electricity, especially can monitor the idle stroke specific to sparger in application widely.Here propose especially, in the low pressure range of high-pressure accumulator and/or the idle stroke of carrying out hydraulic pressure in the low speed range of internal-combustion engine ask for, and carry out asking for the idle stroke of electricity of the hydraulic pressure combined in the medium pressure range (transition region) of high-pressure accumulator.(n < 2000U/min is roughly in the low pressure-accumulating tube pressure range and speed range of working zone, P_ pressure-accumulating tube < 100MPa), the idle stroke of hydraulic pressure is adopted to measure, this is because usually there is time enough to be used for designing the test pulse with necessary length here.In transition region (such as 120MPa < P_ pressure-accumulating tube > 60MPa), determine regularly to compare with the idle stroke of electricity preferably to hydraulic pressure.Extend the duration of charge of sparger for this reason, until with its pressure drop recorded concurrently or pressure surge, leak and over-limit condition (dP_REV) because the controlled sparger that causes switches.The voltage (piezoelectric voltage) simultaneously measured at the end of injector leakage process deducts the voltage before discharge process starts (piezoelectric voltage).The pressure surge dP recorded and the voltage difference recorded have relation.
Consequent transfer function is used for determining the limiting value of voltage functuation dV_REF when adopting the idle stroke of electricity to determine uniquely.This voltage functuation corresponding to suitable pressure surge, and represents the reference stroke of final controlling element.
This transfer function can with pressure correlation store in the controller, and adopt at the same time during the determining with the idle stroke of electricity of hydraulic pressure and be updated regularly.The change of the electric properties of final controlling element (piezo actuator) can be compensated thus, and the validity that the idle stroke that can improve electricity is determined.According to another mode of execution of method of the present invention, in the pressure span determined with the idle stroke of hydraulic pressure that can not adopt electricity concurrently, form reference voltage curve by model by the reference voltage curve tendency in overlapping pressure span.
Therefore, in the method for the invention, according to corresponding operation point-with pressure, rotating speed and injecting times or to attach troops to a unit within the corresponding operation cycle of the cylinder of sparger can for idle stroke determine period characterize-substantially can adopt hydraulic pressure or the idle stroke of electricity determine.As described in, determining with the idle stroke of electricity of hydraulic pressure can be carried out concurrently in transition region, the validity determined of idle stroke of electricity can be improved thus.Idle stroke is determined to adopt this strategy can be applied within the scope of broad characterisitic family, and can realize correcting idle stroke change according to operation point.
Therefore according to the present invention, in this embodiment, try to achieve the idle stroke specific to sparger by the combination of two kinds of methods, these methods complement one another on it requires, make can to carry out idle stroke continuously in the whole operating range of sparger and determine.The redundant signals containing identical information is utilized to improve the robustness of the method that idle stroke is determined.
The invention still further relates to a kind of internal-combustion engine with ejecting system, the sparger that this ejecting system is driven by final controlling element indirectly with at least one and high pressure reservoir.The feature of this internal-combustion engine is, it has the control system being designed to implement said method.Ejecting system, through design, makes it possible to the test pulse applying the electricity to have the energy increased repeatedly to the final controlling element of at least one sparger (piezo actuator).
By reference to the accompanying drawings in detail the present invention will be described in detail by embodiment below.Wherein:
Fig. 1 on the left side illustrates during test pulse sparger voltage and the pressure-accumulating tube pressure plotted curve about the time, and illustrate on the right electricity with voltage functuation in the idle stroke determination situation of hydraulic pressure and pressure surge two plotted curves about the duration of charge of piezo actuator;
In two plotted curves of Fig. 2 on the left side with Fig. 1 on the right of two plotted curves the situation about determining with the idle stroke of hydraulic pressure of electricity is shown similarly, and by transfer function that the electric coherence determined with the idle stroke of hydraulic pressure obtains shown in plotted curve on the right;
The typical field of application determined with the idle stroke of electricity that Fig. 3 illustrates hydraulic pressure and the overlap region (load (pme=cylinder pressure medium) and speed range, pressure-accumulating tube pressure setting value (FUP value)) that two methods can be applied concurrently; With
Fig. 4 is the coordination flow chart between idle stroke that is electric and hydraulic pressure is determined.
Introduce method of the present invention by an embodiment now, according to this embodiment, the idle stroke of hydraulic pressure is determined and the idle stroke of electricity is determined to carry out parallel to each other.Here, apply the test pulse of electricity to have the energy increased repeatedly to the piezoelectricity type fuel injector of the indirect driving of internal-combustion engine, known systematic parameter and high-pressure accumulator pressure or pressure-accumulating tube pressure and the voltage on the piezo actuator of sparger analyzed parallel to each other.
Sparger voltage or piezoelectric voltage (V) and high pressure reservoir pressure or pressure-accumulating tube pressure (bar) during there is shown at the curve on the left side of Fig. 1 the test pulse determined in idle stroke.Visible, during test pulse, create voltage drop or voltage functuation dV and pressure-accumulating tube pressure drop or pressure-accumulating tube pressure surge dP.The size of pressure drop dP is relevant with the idle stroke of sparger with the size of voltage drop dV.
Extend the duration of charge (T_CHA) of piezo actuator repeatedly, increase the energy of test pulse thus.Pressure surge dP (T_CHA) and voltage functuation dV (T_CHA) is illustrated concurrently.Two plotted curves on the right in Fig. 1 illustrate the tendency of voltage functuation dV and pressure surge dP about the duration of charge (T_CHA) of piezo actuator.Therefore, need institute's energy requirement of the voltage drop (dV_REF) of pressure surge (dP_REF) or the regulation being used for realizing regulation relevant to the idle stroke of sparger.
Adopt and carry out determining with the idle stroke of hydraulic pressure of electricity continuously specific to sparger ground in this way, the idle stroke determining to try to achieve caused by wearing and tearing, life-span, temperature and power load distributing by this idle stroke changes, and carry out discharge time correction accordingly.
Ask for the pressure drop on pressure-accumulating tube and the voltage drop on piezo actuator synchronously carries out in time.Two plotted curves on the left side of Fig. 2 and two plotted curves on the right of Fig. 1 illustrate corresponding dV and the dP curve that the idle stroke of hydraulic pressure is determined similarly.As described in, in order to ask for this two curves, extend duration of charge of sparger, until leak and over-limit condition dP_REF because the controlled sparger caused switches with its pressure surge recorded concurrently.Measuring voltage is poor simultaneously, and its piezoelectric voltage be defined as at the end of injector leakage process deducts the piezoelectric voltage before discharge process starts.The pressure surge dP recorded and the voltage difference dV recorded have relation.Obtain the transfer function shown in the right in Fig. 2 in this case.
This transfer function is used for determining the limiting value of voltage functuation dV_REF when adopting the idle stroke of electricity to determine uniquely.This voltage functuation corresponding to suitable pressure surge, and represents the reference stroke of piezo actuator.Transfer function can with pressure correlation store in the controller.When adopting the determining with the idle stroke of electricity of hydraulic pressure at the same time, this transfer function is updated regularly.Compensate the change of the electric properties of piezo actuator thus, and the validity that the idle stroke that improve electricity is determined.
With regard to method of the present invention, hydraulic pressure determined to combine with the idle stroke of electricity, make it possible to the idle stroke monitored in application widely specific to sparger.The typical application determined with the idle stroke of electricity that Fig. 3 illustrates hydraulic pressure and these two kinds of methods can be adopted and the overlap region that can compare this two kinds of methods.Here, horizontal ordinate gives rotating speed (l/min), ordinate gives cylinder pressure medium=load pme (bar).Also show corresponding pressure-accumulating tube pressure setting value (FUP value).The region that the idle stroke that the cross hatched regions domain representation on the left side only carries out hydraulic pressure is determined.Adjacent dashed region represents the region determined with the idle stroke of electricity of carrying out hydraulic pressure concurrently.The cross hatched regions domain representation on the right only carries out the region determined of idle stroke of electricity.Determine to carry out regular comparison with the idle stroke of electricity in transition region or overlap region to hydraulic pressure, as mentioned above.
Figure 4 shows that electricity and the idle stroke of hydraulic pressure determine between coordination flow chart.Determining or idle stroke drift correction to carry out idle stroke, first calculating running state (pressure-accumulating tube pressure, rotating speed, the injecting times of internal-combustion engine ...).If the region that the idle stroke that there is activation hydraulic pressure is determined, determine with regard to the idle stroke of carrying out hydraulic pressure.Then the duration of charge T_CH_ACT of piezo actuator is calculated.Deduct the duration of charge of calculating from reference charge time T_CH_REF afterwards, and then try to achieve difference T_CH_DIF.This difference is used for asking for the injection caused by idle stroke and corrects T_CHA_DIF (FUP) after adjustment and filtration.Obtain corresponding injection thus and correct f (T_CHA_DIFF (FUP)).
The region that the idle stroke of the hydraulic pressure if there is no activated is determined, just checks whether the region that the idle stroke that there is the electricity activated is determined.In this case, determines with regard to the idle stroke of carrying out electricity, then utilizes described transfer function to calculate dV_Ref, and calculate the duration of charge T_CH_ACT of final controlling element accordingly.After this other step is consistent with the step that the idle stroke of above-mentioned hydraulic pressure is determined.
If the region that the idle stroke that also there is not the electricity of activation is determined, determine to combine with the idle stroke of electricity just hydraulic pressure.Calculate to obtain the duration of charge T_CH_ACT of final controlling element accordingly.This value is utilized to carry out more new relation dP_dV.Then carry out with hydraulic pressure determine identical step with the idle stroke of electricity.
Claims (8)
1. for driving a method for internal-combustion engine, this internal-combustion engine has ejecting system, the sparger that ejecting system is driven by final controlling element indirectly with at least one and high pressure reservoir, and the method has following steps:
Apply the test pulse of the electricity to have the energy increased repeatedly to continuously during the operation phase final controlling element of at least one sparger, transport pump or common injection is not carried out in the described operation phase, and the pressure drop caused thus of trying to achieve in high pressure reservoir, hydraulically ask for the idle stroke of final controlling element thus continuously;
When determine pressure drop change and and then determine compared to reference value idle stroke change, the discharge time of sparger is corrected accordingly,
It is characterized in that, continuously electric ask for idle stroke time, apply the test pulse of the electricity to have the energy increased repeatedly to continuously the final controlling element of at least one sparger, and try to achieve the voltage drop caused thus on the final controlling element of sparger, determine the idle stroke of the final controlling element of sparger thus, the idle stroke of continuous print hydraulic pressure is asked for and is asked for mutual combination with the idle stroke of continuous print electricity.
2. the method for claim 1, is characterized in that, carries out idle stroke that is hydraulic pressure, electric or combination ask for according to the corresponding operation point of internal-combustion engine.
3. method as claimed in claim 1 or 2, is characterized in that, in the low pressure range of high pressure reservoir and/or the idle stroke of carrying out hydraulic pressure in the low speed range of internal-combustion engine ask for.
4. the method for claim 1, is characterized in that, carries out asking for the idle stroke of electricity of the hydraulic pressure combined in the medium pressure range of high pressure reservoir.
5. method as claimed in claim 3, it is characterized in that, combination hydraulic pressure ask for situation with the idle stroke of electricity under, the pressure drop recorded and voltage drop interrelated, and determine transfer function accordingly, this transfer function is used as reference function under the idle stroke of electricity asks for situation.
6. the method for claim 1, is characterized in that, in the pressure span of asking for the idle stroke of electricity can not carrying out hydraulic pressure concurrently, forms reference voltage curve by model by the reference voltage curve tendency in overlapping pressure span.
7. the method for claim 1, is characterized in that, the idle stroke of continuous print hydraulic pressure is asked for ask for the idle stroke of continuous print electricity and carried out parallel to each other.
8. one kind has the internal-combustion engine of ejecting system, the sparger that this ejecting system is driven by final controlling element indirectly with at least one and high pressure reservoir, it is characterized in that, this internal-combustion engine has the control system being designed to the method implemented any one of aforementioned claim.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102010021168.0A DE102010021168B4 (en) | 2010-05-21 | 2010-05-21 | Method for operating an internal combustion engine and internal combustion engine |
| DE102010021168.0 | 2010-05-21 | ||
| PCT/EP2011/057107 WO2011144445A1 (en) | 2010-05-21 | 2011-05-04 | Adaptive idle stroke compensation for fuel injection valves |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103154479A CN103154479A (en) | 2013-06-12 |
| CN103154479B true CN103154479B (en) | 2016-04-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180025368.8A Active CN103154479B (en) | 2010-05-21 | 2011-05-04 | Scalability idle stroke for fuel injection valve compensates |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US9103297B2 (en) |
| CN (1) | CN103154479B (en) |
| DE (1) | DE102010021168B4 (en) |
| WO (1) | WO2011144445A1 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009018288B4 (en) * | 2009-04-21 | 2011-09-22 | Continental Automotive Gmbh | Method and device for determining a pressure in a high-pressure accumulator |
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Also Published As
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| CN103154479A (en) | 2013-06-12 |
| DE102010021168A1 (en) | 2011-11-24 |
| WO2011144445A1 (en) | 2011-11-24 |
| US9103297B2 (en) | 2015-08-11 |
| DE102010021168B4 (en) | 2020-06-25 |
| US20130066538A1 (en) | 2013-03-14 |
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